I received many emails about comparing my Ricoh GR with my Fuji X100 + WCL-X100 wide-angle converter mounted. The converter turns the 35mm Fuji lens equivalent to approximately 28mm, like Ricoh´s fixed lens. I was curious myself so I had the converter for 30 minutes and went out to take some snaps.
Unfortunatly it was a heavily overcasted day. I shot in RAW, ISO 400, f/4, converted in LR 4.4 in black and white, applied very little sharpness with same settings.
Ricoh GR weights only 245g including battery, the Fuji X100 with the converter mounted 574g. Although the WCL-X100 adds 129g the camera feels balanced and densed. It does not make the X100 front-heavy. You can read more about comparing the WCL-X100 wide-angle converter, and TCL-X100 teleconverter to the 18mm f/2, and 35mm f/1.4
The WCL adds more versatility to your X100 by giving you a wider angle of 28mm, but for myself, I don´t really need it. If I want that little bit of extra space in my frame (and can´t make two steps back), I simply take my Ricoh GR out of my pocket. Or even attach the wide conversion lens GW-3 on it, which gives me a 21mm equivalent.
Because I only have a X100, which has a 12,3 MP APS-C CMOS sensor with primary color filter, this is more a personal comparison and not a general judgement. The Ricoh GR has a 16,2 MP APS-C CMOS sensor without an AA filter which shows more details and sharpness on the RAW files. But Fuji´s JPG´s are stellar and colors are wonderful.